Monorepo for Aesthetic.Computer aesthetic.computer

ac-os: portable cache size check in pull_ota master

`stat -c%s` is Linux-only; on macOS it silently failed and the fallback `|| echo 0` made the SLIM/INITRAMFS cache check always miss, forcing a ~340MB re-download on every `ac-os pull`. Swap to `wc -c <` which works on both platforms. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>


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